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Pumpelly is active in the American Le Mans Series, Rolex Sports Car Series and the Continental Tire Sports Car Challenge. Spencer drove for Flying Lizard Motorsports and BGB Motorsports during the 2013 season.
Spencer lives with his wife Lindsay, son Ryder, and daughter Parker in Atlanta GA. He has been a vegetarian since 2003 and a vegan since 2010, meaning he does not eat any products that come from an animal, including dairy products, eggs or honey. During a visit to the Farm Sanctuary in June 2011, Spencer was quoted, saying "I'm honored to support Farm Sanctuary and the people who are devoted to defending others."
- http://www.grand-am.com/drivers/driver.cfm?series=r&did=2144 Verified January 23, 2012.
- "Vegans in NASCAR? What the Daggum…?". TimesUnion. August 17, 2011. Retrieved March 22, 2013.